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20030619: NCEP/NCAR Reanalysis on cd and dcgrib
- Subject: 20030619: NCEP/NCAR Reanalysis on cd and dcgrib
- Date: Tue, 24 Jun 2003 14:59:53 -0600
Ruth,
The grib data you have is specifying a period of time for the average
precipitation rate, and so you end up with 2 times (time1:time2).
In gdlist, to list the first time in your file, you would need to set
GDATTIM=790101/0000:790101/0000
I downloaded your file and sucessfully listed one of the fields using:
GDATTIM = 790801/0000:790801/0000
GLEVEL = 0
GVCORD = none
GFUNC = ave_pr--
GDFILE = 2001.cmporain.sfc.gem
GAREA = dset
PROJ = ced
SCALE = 999
OUTPUT = t
GEMPAK-GDLIST>
Actually, I would have expected the average to be from Jan 1 to Jan 31 etc,
instead of having the same time for both time1 and time2.
I'd suggest using dcgrib2 rather than dcgrib (depricated) as
it handles the different grib time types better. See if
that gives the same start/stop times for the average (if so, its
really that way in the GRIB). But, thats just cosmetic...it
won't affect your displays.
Steve Chiswell
>From: Ruth Platner <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200306191735.h5JHZwLd017057
>
>--------------730365F8EB909D7E997E0C18
>Content-Type: text/plain; charset=us-ascii
>Content-Transfer-Encoding: 7bit
>
>Hi,
>
>I have the NCEP/NCAR Reanalysis data on cd. I've converted many of these
>files to gempak files using dcgrib. I haven't had any problems until I
>converted the monthly average of observations for PRATE, precipitation
>rate.
>
>I don't get any errors from dcgrib, I logged the conversion verbosely
>and everything seems fine.
>
>Here's the command I used:
>
>/ljuka/ldm/gempak/bin/sol/dcgrib -d dcgrib.log -g /ljuka/ldm/gempak/gempak/tab
> les -v 2001.cmporain.sfc.gem < /cdrom/reanal01/data/obs/cmporain.sfc
>
>gdinfo will list the file information as long as gdattim=all.
>
> GDFILE = 2001.cmporain.sfc.gem
>
> LSTALL = YES
>
> OUTPUT = T
>
> GDATTIM = all
>
> GLEVEL = 0
>
> GVCORD = none
>
> GFUNC = AVE_PR--
>
> GRID FILE: 2001.cmporain.sfc.gem
>
> GRID NAVIGATION:
>
> PROJECTION: CED
>
> GRID SIZE: 144 73
>
> LL CORNER: -90.00 0.00
>
> UR CORNER: 90.00 -2.50
>
> GRID ANALYSIS BLOCK:
>
> UNKNOWN ANALYSIS TYPE
>
> Number of grids in file: 278
>
> Maximum number of grids in file: 1500
>
> NUM TIME1 TIME2 LEVL1 LEVL2 VCORD PARM
>
> 1 790101/0000 790101/0000 0 NONE AVE_PR--
>
> 2 790201/0000 790201/0000 0 NONE AVE_PR--
>
> 3 790301/0000 790301/0000 0 NONE AVE_PR--
>
>If I set gdattim=first, it can't find the data
>
> GEMPAK-GDINFO>gdattim=first
>
> GEMPAK-GDINFO>run
>
> GRID FILE: 2001.cmporain.sfc.gem
>
> GRID NAVIGATION:
>
> PROJECTION: CED
>
> GRID SIZE: 144 73
>
> LL CORNER: -90.00 0.00
>
> UR CORNER: 90.00 -2.50
>
> GRID ANALYSIS BLOCK:
>
> UNKNOWN ANALYSIS TYPE
>
> Number of grids in file: 278
>
> Maximum number of grids in file: 1500
>
> [GDU 2] Did not find any matching grids.
>
>Gdlist gives me the following:
>
>aspre monthlyrean 69% gdlist
>
> GDATTIM Grid date/time 790301/0000
>
> GLEVEL Grid level 0
>
> GVCORD Grid vertical coordinate none
>
> GFUNC Scalar grid AVE_PR--
>
> GDFILE Grid file 2001.cmporain.sfc.gem
>
> GAREA Graphics area 20;85;60;150
>
> PROJ Map projection/angles/margins|dr ced
>
> SCALE Scalar scale / vector scale 999
>
> OUTPUT Output device/filename T
>
> GEMPAK-GDLIST>run
>
> [DG -7] Input grid AVE_PR-- ^790301/0000 @0 %NONE cannot be found.
>
>This is true for all the dates, not just the first date. It seems that
>the problem is with the dates, but I'm not sure.
>
>Do you have any ideas?
>
>2001.cmporain.sfc.gem is an 11MB file so I haven't attached it, but I
>put it and the dcgrib.log file at
>ftp://oldeuros.gso.uri.edu/pub/rlp/gempak/
>
>Thanks,
>
>Ruth
>
>
>
>--------------730365F8EB909D7E997E0C18
>Content-Type: text/html; charset=us-ascii
>Content-Transfer-Encoding: 7bit
>
><!doctype html public "-//w3c//dtd html 4.0 transitional//en">
><html>
>Hi,
><p>I have the NCEP/NCAR Reanalysis data on cd. I've converted many of these
>files to gempak files using dcgrib. I haven't had any problems until I
>converted the monthly average of observations for PRATE, precipitation
>rate.
><p>I don't get any errors from dcgrib, I logged the conversion verbosely
>and everything seems fine.
><p>Here's the command I used:
><pre>/ljuka/ldm/gempak/bin/sol/dcgrib -d dcgrib.log -g /ljuka/ldm/gempak/gempa
> k/tables -v 2001.cmporain.sfc.gem < /cdrom/reanal01/data/obs/cmporain.sfc<
> /pre>
>gdinfo will list the file information as long as gdattim=all.
><pre> GDFILE = 2001.cmporain.sfc.gem</pre>
>
><pre> LSTALL = YES</pre>
>
><pre> OUTPUT = T</pre>
>
><pre> GDATTIM = all</pre>
>
><pre> GLEVEL = 0</pre>
>
><pre> GVCORD = none</pre>
>
><pre> GFUNC = AVE_PR--</pre>
>
><pre> GRID FILE: 2001.cmporain.sfc.gem</pre>
>
><pre> GRID NAVIGATION:</pre>
>
><pre> PROJECTION: &
> nbsp; CED</pre>
>
><pre> GRID SIZE: &n
> bsp; 144 73</pre>
>
><pre> LL CORNER: &n
> bsp; -90.00 0.00<
> /pre>
>
><pre> UR CORNER: &n
> bsp; 90.00 -2.50<
> /pre>
>
><pre> GRID ANALYSIS BLOCK:</pre>
>
><pre> UNKNOWN ANALYSIS TYPE</pre>
>
><pre> Number of grids in file: 278</pre>
>
><pre> Maximum number of grids in file: 1500</pre>
>
><pre> NUM TIME1 &nb
> sp; TIME2 &n
> bsp; LEVL1 LEVL2 VCORD PARM</
> pre>
>
><pre> 1 790101/0000  
> ; 790101/0000 &nbs
> p; 0 NONE A
> VE_PR--</pre>
>
><pre> 2 790201/0000  
> ; 790201/0000 &nbs
> p; 0 NONE A
> VE_PR--</pre>
>
><pre> 3 790301/0000  
> ; 790301/0000 &nbs
> p; 0 NONE A
> VE_PR--</pre>
>If I set gdattim=first, it can't find the data
><pre> GEMPAK-GDINFO>gdattim=first</pre>
>
><pre> GEMPAK-GDINFO>run</pre>
>
><pre> GRID FILE: 2001.cmporain.sfc.gem</pre>
>
><pre> GRID NAVIGATION:</pre>
>
><pre> PROJECTION: &
> nbsp; CED</pre>
>
><pre> GRID SIZE: &n
> bsp; 144 73</pre>
>
><pre> LL CORNER: &n
> bsp; -90.00 0.00<
> /pre>
>
><pre> UR CORNER: &n
> bsp; 90.00 -2.50<
> /pre>
>
><pre> GRID ANALYSIS BLOCK:</pre>
>
><pre> UNKNOWN ANALYSIS TYPE</pre>
>
><pre> Number of grids in file: 278</pre>
>
><pre> Maximum number of grids in file: 1500</pre>
>
><pre> [GDU 2] Did not find any matching grids.</pre>
>Gdlist gives me the following:
><pre>aspre monthlyrean 69% gdlist</pre>
>
><pre> GDATTIM Grid date/time &nb
> sp; &n
> bsp; 790301/0000</pre>
>
><pre> GLEVEL Grid level &n
> bsp; &
> nbsp; 0</pre>
>
><pre> GVCORD Grid vertical coordinate
> none</pre>
>
><pre> GFUNC Scalar grid &n
> bsp; &
> nbsp; AVE_PR--</pre>
>
><pre> GDFILE Grid file &nb
> sp; &n
> bsp; 2001.cmporain.sfc.gem</pre>
>
><pre> GAREA Graphics area
>  
> ; 20;85;60;150</pre>
>
><pre> PROJ Map projection/angles/margins|dr
> ced</pre>
>
><pre> SCALE Scalar scale / vector scale &nbs
> p; 999</pre>
>
><pre> OUTPUT Output device/filename &n
> bsp; T</pre>
>
><pre> GEMPAK-GDLIST>run</pre>
>
><pre> [DG -7] Input grid AVE_PR-- ^790301/0000 @0 %NONE cannot be f
> ound.</pre>
>This is true for all the dates, not just the first date. It seems that
>the problem is with the dates, but I'm not sure.
><p>Do you have any ideas?
><p>2001.cmporain.sfc.gem is an 11MB file so I haven't attached it, but
>I put it and the dcgrib.log file at <A HREF="ftp://oldeuros.gso.uri.edu/pub/rl
> p/gempak/">ftp://oldeuros.gso.uri.edu/pub/rlp/gempak/</A>
><p>Thanks,
><p>Ruth
><br>
><br> </html>
>
>--------------730365F8EB909D7E997E0C18--
>
